Vehicle-tire.



P-'AIIEQNTED SEPT. l, 1903` Nn.. www.

A. PRINZHORN.

VEHICLE TIEL BEST AVAlLABLE CO'F"v APPLICATION FILED MAY 11 1903 Figi'E0 MODEL.

' BEST .Lu/Almere coe Patented September l, 1903.

PATENT OFFICE.

ADoLF PRINZHORN,oF'HANovER, GERMANXKA y VEHICLE-TIRE;V

SPECIFICATION forming part f Letters Patent hlm-738,064, dated September1, 1903. 2

Application fled May 11. 1903. Serial No. 156,658. (No model.)

To all whom it may oon/eerie.-

Be it known that I, AD'oLE PRINZHORN, a

l subject of the German Emperor, residing at Hanover, in the Kingdom ofPrussia, German Empire, have invented certain new and usefulImprovements in Vehicle-Tires and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled-in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which forma part of thisspecification.

My invention relates to tires, and more particularly to devices forpreventing thevslipping of the wheels of bicycles, automobiles, and thelike to the side on damp or slippery roads.

I have shown the device applied to the outer tube of an automobile-tire,the struc ture being such as to prevent the antislipping device frombeing forced into the tire.

Referring to the drawings, in which likey parts are similarlydesignated, Figure l is a cross-section ofthe outer tube of anautomobile-tire, and Fig. 2 is a top plan view of the head of theantislipping device.

This device consists of anut CZ, having preferably a flange e orsuitable lateral projections on one end embedded within the tire a,supported and more securely held in place between the customarystrengthening-strips of fabric 4 5, through 'some of which, 5, the shankof the nut passes. Into this nut is screwed a large-headed bolt orscrew, the head of which is provided with corrugations or points D andthe center thereof with a threaded shank c,

provided with any suitable means to enable it to be screwed home intothe nut, and to this end I have shown the bolt provided with two holes ffor* the pins of a su. fe key, Fig. 2. It will be observed that the headis practically eountersunk, only the points Z2 on the head of the boltproject but slightly bcyond the tread-face of the tire. It will thus beseen that the bolts when worn down can be easily removed and replaced bynew ones.

Other modes of securing a changeable tread-bolt to the tire may be used,and the device is applicable to solid-rubber tires as well as pneumatictires.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

l. The combination with a tire and a nut held therein; of a screw havingan enlarged 4roughened head slightly projecting beyond ADOLF PRINZIIORN.

lVitnesses:

LEONORE RAsci-r, E. G. WHITE.

taking into the nut. rlhe screw or bolt is

